Antique School Slate with Two Sets of Carved InitialsI always keep an eye out for beautiful old school slates, and specifically ones that have been personalized one way or another (or mended and mended again.) This one, late 19th century I would guess, has held together very well, no mends required, but was used by at least two different students, who left their initials carved into the frame. (It looks to me like MDW on one side and N, plus maybe also a a PF on one long side, an a few other more